The database for a study of the effects of climate change on the sediment flux of 20 of the larger streams entering the sea from the coasts of central and southern California is presented here. The database includes selected rain fall records, streamflow, hydrographs, sediment flux, and a 92-year record of Southern Oscillation Index (SOI) which serves as an indication of climate change. Procedures for determining sediment flux from stream flow and for delineating climate trends in the data are also presented.